Place your sheet metal on your steel block and position your centre punch at a central point in your cut out design.
How do i cut a hole in sheet metal.
Step 1 create a paper pattern of the size and shape of hole you wish to cut.
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The wooden bread layers of the sandwich keep the sheet metal flat and prevent the drill bit from wandering as it bores through the sheet metal.
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Knockout punches circle cutters are also pretty famous for creating holes in metal sheets.
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Tap your hammer to leave an indentation on the sheet metal.
Then create a pilot hole within the penciled circle using a power drill.
In small holes finger twist larger twist drill over the hole.
Your hole burrs depend on your drill or cutter.
When drilling or punching a hole in sheet metal you more or less cut out the entire hole at once.
Depending on the tools you have you ll now need to punch or drill a hole where the indentation has been made to produce an accurate hole in your sheet metal.
Position the pattern on the sheet metal where the hole needs to go and draw a line around it using a permanent marker.
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Smooth out the hole.
Some items cut clean and some create rough and sharp insides.
If your project requires cutting a hole in the center of sheet metal draw it on the metal as you would any other cut line.
For clean precise holes in thin sheet metal make a wood sandwich.
Simply sandwich the sheet metal between two pieces of wood and clamp everything down on a table or workbench.